Cyano-substituted benzochalcogenadiazole-based polymer semiconductors for balanced ambipolar organic thin-film transistors
DC Field | Value | Language |
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dc.contributor.author | Shi, Shengbin | - |
dc.contributor.author | Wang, Hang | - |
dc.contributor.author | Chen, Peng | - |
dc.contributor.author | Uddin, Mohammad Afsar | - |
dc.contributor.author | Wang, Yuxi | - |
dc.contributor.author | Tang, Yumin | - |
dc.contributor.author | Guo, Han | - |
dc.contributor.author | Cheng, Xing | - |
dc.contributor.author | Zhang, Shiming | - |
dc.contributor.author | Woo, Han Young | - |
dc.contributor.author | Guo, Xugang | - |
dc.date.accessioned | 2021-09-02T08:48:35Z | - |
dc.date.available | 2021-09-02T08:48:35Z | - |
dc.date.created | 2021-06-16 | - |
dc.date.issued | 2018-07-28 | - |
dc.identifier.issn | 1759-9954 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/74302 | - |
dc.description.abstract | Due to their high-lying lowest unoccupied molecular orbitals (LUMOs), pi-conjugated polymers based on benzothiadiazole and its derivatives typically are p-type. We report here the successful development of two narrow bandgap, ambipolar donor-acceptor copolymers, PDCNBT2T and PDCNBSe2T, which are based on new cyano-substituted strong electron acceptors, 4,7-dibromo-5,6-dicyano-2,1,3-benzothiadiazole (DCNBT) and 4,7-dibromo-5,6-dicyano-2,1,3-benzoselenadiazole (DCNBSe), respectively. Compared to their polymer analogues with fluorine substituents, the LUMO was lowered by a big margin of ca. 0.6 eV and the bandgap was reduced by 0.2-0.3 eV for the cyano-substituted polymers. Therefore, the cyano-substituted benzothiadiazole polymers showed very low-lying LUMO levels of ca. 4.3 eV. Benefiting from their narrow bandgaps of 1.1-1.2 eV and appropriately positioned LUMO levels, both polymers exhibit well balanced ambipolar transport characteristics in organic thin-film transistors, which differ from the p-type dominating transport properties of their fluorinated polymer analogues. A balanced hole/electron mobility of 0.59/0.47 cm(2) V-1 s(-1) was achieved for polymer PDCNBT2T, and a reduced hole/electron mobility of 0.018/0.014 cm(2) V-1 s(-1) was observed for the benzoselenadiazole-based PDCNBSe2T due to its lower crystallinity. These results show that the electron mobility can be enhanced by approximately two orders versus the electron mobility of the previously reported 4,7-di(thiophen-2- yl)-5,6-dicyano-2,1,3-benzothiadiazole-based polymer. This improvement was achieved by using the new acceptor units without additional electron-rich thiophene flanks, which allow a higher degree of freedom in selecting the donor co-unit and more effective tuning of energy levels of frontier molecular orbitals. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | FIELD-EFFECT TRANSISTORS | - |
dc.subject | TO-HEAD LINKAGE | - |
dc.subject | HIGH-PERFORMANCE | - |
dc.subject | CONJUGATED POLYMERS | - |
dc.subject | FLUORINATED BENZOTHIADIAZOLE | - |
dc.subject | DIIMIDE SEMICONDUCTORS | - |
dc.subject | MOLECULAR-WEIGHT | - |
dc.subject | MATERIALS DESIGN | - |
dc.subject | SOLAR-CELLS | - |
dc.subject | MOBILITY | - |
dc.title | Cyano-substituted benzochalcogenadiazole-based polymer semiconductors for balanced ambipolar organic thin-film transistors | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Woo, Han Young | - |
dc.identifier.doi | 10.1039/c8py00540k | - |
dc.identifier.scopusid | 2-s2.0-85050482528 | - |
dc.identifier.wosid | 000439529100004 | - |
dc.identifier.bibliographicCitation | POLYMER CHEMISTRY, v.9, no.28, pp.3873 - 3884 | - |
dc.relation.isPartOf | POLYMER CHEMISTRY | - |
dc.citation.title | POLYMER CHEMISTRY | - |
dc.citation.volume | 9 | - |
dc.citation.number | 28 | - |
dc.citation.startPage | 3873 | - |
dc.citation.endPage | 3884 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Polymer Science | - |
dc.relation.journalWebOfScienceCategory | Polymer Science | - |
dc.subject.keywordPlus | FIELD-EFFECT TRANSISTORS | - |
dc.subject.keywordPlus | TO-HEAD LINKAGE | - |
dc.subject.keywordPlus | HIGH-PERFORMANCE | - |
dc.subject.keywordPlus | CONJUGATED POLYMERS | - |
dc.subject.keywordPlus | FLUORINATED BENZOTHIADIAZOLE | - |
dc.subject.keywordPlus | DIIMIDE SEMICONDUCTORS | - |
dc.subject.keywordPlus | MOLECULAR-WEIGHT | - |
dc.subject.keywordPlus | MATERIALS DESIGN | - |
dc.subject.keywordPlus | SOLAR-CELLS | - |
dc.subject.keywordPlus | MOBILITY | - |
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